Chair frame



FIG. 1 is a perspective view of the chair frame showing my new design;

FIG. 2 is a side elevational view of the chair frame (the opposite side being a mirror image thereof);

FIG. 3 is a front elevational view of the chair frame; and

FIG. 4 is a plan view of the chair frame;

FIG. 5 is a perspective view of an alternate embodiment of the chair frame. 

The ornamental design for a chair frame, as shown and described. 